II/130 2-D Classification, Vilnius Photometry M56 Region (Smriglio+ 1986)
Automated Two-Dimensional Classification from Multicolour Photometry in the
Vilnius System
Smriglio F., Boyle R.P., Straizys V., Janulis R., Nandy K.,
MacGillivray H.T., McLachlan A., Coluzzi R., and Segato C.
<Astron. Astrophys. Suppl. Ser., 66, 181-190 (1986)>
=1986A&AS...66..181S 1986A&AS...66..181S
ADC_Keywords: Photometry, classification ; Photometry, Vilnius
Description:
This catalogue gives the seven-color photometry in the Vilnius system
stars and two-dimensional classification of 752 stars.
Photographically determined magnitudes obtained by COSMOS
(MacGillivray and Stobie 1984) on the Schmidt plates were input into
software described by Smriglio et al. (1986) as a method of automated
two-dimensional stellar classification in the Vilnius seven-color
intermediate band photometric system (Straizys and Zdanavicius 1970).
A region of approximately two square degrees in Lyra centered on
RA(1950) = 19h14.6min, DE(1950) = 30deg05' in the direction of the
globular cluster M56 was studied and the two-dimensional
classification of 752 stars in the magnitude range V = 11 to 15 mag
was studied. The photometric system, the method of reduction, the
classification procedure and errors were described by Smriglio et al.
(1986). The number of stars for which all the six color indices in the
Vilnius system are available is close to 3000, but the number of stars
which have received two dimensional classification is 752. The success
rate of classification appears to be high for stars brighter than V =
15.0 mag for which photometric accuracy is better than ±5%.
See also:
GCPD/21 : General Catalogue of Photometric Data, Vilnius System
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
data.dat 94 752 The Data
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Byte-by-byte Description of file: data.dat
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Bytes Format Units Label Explanations
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1-3 I3 --- ID Running number
7-8 I2 h RAh Right Ascension (1950.0) hours
10-11 I2 min RAm Right Ascension (1950.0) minutes
13-16 F4.1 s RAs Right Ascension (1950.0) seconds
19 A1 --- DE- Declination sign
20-21 I2 deg DEd Declination (1950.0) degrees
23-24 I2 arcmin DEm Declination (1950.0) arcminutes
26-27 I2 arcsec DEs Declination (1950.0) arcseconds
33-37 F5.2 mag Vmag V magnitude
42-45 F4.2 mag U-P ? U-P color index
50-53 F4.2 mag P-X P-X color index
58-61 F4.2 mag X-Y X-Y color index
66-69 F4.2 mag Y-Z Y-Z color index
74-77 F4.2 mag Z-V Z-V color index
82-85 F4.2 mag V-S ? V-S color index
91-92 A2 --- Sp Spectral type
94 A1 --- Lum *[dgc] Luminosity class
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Note on Lum:
d = dwarf
g = giant
c = supergiant
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References:
MacGillivray H.T. and Stobie R.S. (1984) Vistas Astron., 27, 433.
Smriglio F., Boyle R.P., Straizys V., Janulis R., Mandy K., MacGillivray
H.T., McLachlan A., Coluzzi R. and Segato C. (1986) Astron. Astrophys.
Suppl. Ser., 66, 181.
Straizys V. and Zdanavicius K. (1970) Bull. Vilnius Obs., 29, 15.
(End) Julie Anne Watko [SSDOO/ADC] 30-May-1996